/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.cap.service.circuitSwitchedCall.primitive;

import java.io.IOException;

import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.cap.api.CAPException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.primitive.MessageIDText;
import org.mobicents.protocols.ss7.cap.primitives.CAPAsnPrimitive;

/**
 * 
 * @author sergey vetyutnev
 * 
 */
public class MessageIDTextImpl implements MessageIDText, CAPAsnPrimitive {

	public static final int _ID_messageContent = 0;
	public static final int _ID_attributes = 1;

	public static final String _PrimitiveName = "MessageIDText";

	private String messageContent;
	private byte[] attributes;
	
	
	public MessageIDTextImpl() {
	}

	public MessageIDTextImpl(String messageContent, byte[] attributes) {
		this.messageContent = messageContent;
		this.attributes = attributes;
	}

	@Override
	public String getMessageContent() {
		return messageContent;
	}

	@Override
	public byte[] getAttributes() {
		return attributes;
	}

	@Override
	public int getTag() throws CAPException {
		return Tag.SEQUENCE;
	}

	@Override
	public int getTagClass() {
		return Tag.CLASS_UNIVERSAL;
	}

	@Override
	public boolean getIsPrimitive() {
		return false;
	}
	@Override
	public void decodeAll(AsnInputStream ansIS) throws CAPParsingComponentException {

		try {
			int length = ansIS.readLength();
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	@Override
	public void decodeData(AsnInputStream ansIS, int length) throws CAPParsingComponentException {

		try {
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	private void _decode(AsnInputStream ansIS, int length) throws CAPParsingComponentException, IOException, AsnException {

		this.messageContent = null;
		this.attributes = null;

		AsnInputStream ais = ansIS.readSequenceStreamData(length);
		while (true) {
			if (ais.available() == 0)
				break;

			int tag = ais.readTag();

			if (ais.getTagClass() == Tag.CLASS_CONTEXT_SPECIFIC) {
				switch (tag) {
				case _ID_messageContent:
					this.messageContent = ais.readIA5String();
					if (this.messageContent.length() < 1 || this.messageContent.length() > 127)
						throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName
								+ ": messageContent length must be from 1 to 127, found " + this.messageContent.length(),
								CAPParsingComponentExceptionReason.MistypedParameter);
					break;
				case _ID_attributes:
					this.attributes = ais.readOctetString();
					if (this.attributes.length < 2 || this.attributes.length > 10)
						throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName + ": attributes length must be from 2 to 10, found "
								+ this.attributes.length, CAPParsingComponentExceptionReason.MistypedParameter);
					break;

				default:
					ais.advanceElement();
					break;
				}
			} else {
				ais.advanceElement();
			}
		}

		if (this.messageContent == null)
			throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName + ": messageContent is mandatory but not found ",
					CAPParsingComponentExceptionReason.MistypedParameter);
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs) throws CAPException {
		this.encodeAll(asnOs, this.getTagClass(), this.getTag());
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws CAPException {

		try {
			asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
			int pos = asnOs.StartContentDefiniteLength();
			this.encodeData(asnOs);
			asnOs.FinalizeContent(pos);
		} catch (AsnException e) {
			throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public void encodeData(AsnOutputStream aos) throws CAPException {

		if (this.messageContent == null)
			throw new CAPException("Error while encoding " + _PrimitiveName + ": messageContent must not be null");
		if (this.messageContent.length() < 1 || this.messageContent.length() > 127)
			throw new CAPException("Error while encoding " + _PrimitiveName + ": messageContent length must not be from 1 to 127, found: "
					+ this.messageContent.length());

		try {
			aos.writeStringIA5(Tag.CLASS_CONTEXT_SPECIFIC, _ID_messageContent, this.messageContent);
			if (this.attributes != null) {
				if (this.attributes.length < 2 || this.attributes.length > 10)
					throw new CAPException("Error while encoding " + _PrimitiveName + ": messageContent length must not be from 2 to 10, found: "
							+ this.attributes.length);
				aos.writeOctetString(Tag.CLASS_CONTEXT_SPECIFIC, _ID_attributes, this.attributes);
			}
			
		} catch (IOException e) {
			throw new CAPException("IOException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		} catch (AsnException e) {
			throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public String toString() {

		StringBuilder sb = new StringBuilder();
		sb.append(_PrimitiveName);
		sb.append(" [");

		if (this.messageContent != null) {
			sb.append("messageContent=[");
			sb.append(messageContent);
			sb.append("]");
		}
		if (this.attributes != null) {
			sb.append(", attributes=");
			sb.append(printDataArr(this.attributes));
		}

		sb.append("]");

		return sb.toString();
	}

	private String printDataArr(byte[] arr) {
		StringBuilder sb = new StringBuilder();
		for (int b : arr) {
			sb.append(b);
			sb.append(", ");
		}

		return sb.toString();
	}
}

